JPS57184346A - Spectrum spreading communication system and receiving device - Google Patents

Spectrum spreading communication system and receiving device

Info

Publication number
JPS57184346A
JPS57184346A JP56069020A JP6902081A JPS57184346A JP S57184346 A JPS57184346 A JP S57184346A JP 56069020 A JP56069020 A JP 56069020A JP 6902081 A JP6902081 A JP 6902081A JP S57184346 A JPS57184346 A JP S57184346A
Authority
JP
Japan
Prior art keywords
generator
series
signal
initial value
register
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP56069020A
Other languages
Japanese (ja)
Other versions
JPH0530094B2 (en
Inventor
Yukiami Furuya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56069020A priority Critical patent/JPS57184346A/en
Publication of JPS57184346A publication Critical patent/JPS57184346A/en
Publication of JPH0530094B2 publication Critical patent/JPH0530094B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0602—Systems characterised by the synchronising information used
    • H04J3/0605—Special codes used as synchronising signal
    • H04J3/0608—Detectors therefor, e.g. correlators, state machines

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To improve the using efficiency of a frequency, by switching the register initial value of an M series generator at the transmitting side and detecting the time position where the peak value emerges in the adverse decentralization mode at the receiving side respectively. CONSTITUTION:A signal series to be transmitted is supplied through a termial 100 and stored in an N-stage register 110. The data of the register 110 is loaded as the initial value of an N-stage M series generator 120. The generator 120 transmits the signal of a chip of double period to a modulator 130 based on the above-mentioned initial value. The modulator 130 trnsmits the output of the generator 120 after double-phase modulation. A signal receiver detects the correation with the M series of a specific phase through a matching filter 170 for a recived signal. The peak value of the filter 170 is detected by a maximum value detecting circuit 180. The time phase of that moment is applied through a converting circuit 190 in the form of the initial value of the M series generator. Thus the N-bit signal can be detected.
JP56069020A 1981-05-08 1981-05-08 Spectrum spreading communication system and receiving device Granted JPS57184346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56069020A JPS57184346A (en) 1981-05-08 1981-05-08 Spectrum spreading communication system and receiving device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56069020A JPS57184346A (en) 1981-05-08 1981-05-08 Spectrum spreading communication system and receiving device

Publications (2)

Publication Number Publication Date
JPS57184346A true JPS57184346A (en) 1982-11-13
JPH0530094B2 JPH0530094B2 (en) 1993-05-07

Family

ID=13390474

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56069020A Granted JPS57184346A (en) 1981-05-08 1981-05-08 Spectrum spreading communication system and receiving device

Country Status (1)

Country Link
JP (1) JPS57184346A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0457532A (en) * 1990-06-27 1992-02-25 Nec Corp Spread spectrum modulator

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5254308A (en) * 1975-10-29 1977-05-02 Japan Radio Co Ltd System for transmitting radio data

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5254308A (en) * 1975-10-29 1977-05-02 Japan Radio Co Ltd System for transmitting radio data

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0457532A (en) * 1990-06-27 1992-02-25 Nec Corp Spread spectrum modulator

Also Published As

Publication number Publication date
JPH0530094B2 (en) 1993-05-07

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